(19)

(11)

EP 0 365 558 A1

(12)

(43) Date of publication: 02.05.1990 Bulletin 1990/18 (21) Application number: 88905394.0 (22) Date of filing: 15.06.1988

(51) International Patent Classification (IPC):  C25B 1/ 30( . ) C25B 1/ 00( . ) (86) International application number: PCT/GB1988/000461 (87) International publication number: WO 1988/010326 (29.12.1988 Gazette 1988/28)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 17.06.1987 GB 19870014156 17.06.1987 GB 19870014157 (71) Applicant: THE SECRETARY OF STATE FOR DEFENCE IN HER BRITANNIC MAJESTY'S GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN London SW1A 2HB (GB)	(72) Inventors: MARSHALL, Rodney, John Hampshire (GB) SCHIFFRIN, David, Jorge Hampshire SO1 8AY (GB) WALSH, Francis, Charles Fareham Hampshire (GB) BAGG, Greville, Evan, Gordon Essex EN19 1LD (GB) (74) Representative: Beckham, Robert William, et al  Defence Research Agency Intellectual Property Department DRA Farnborough Farnborough, Hants. GU14 6TD Farnborough, Hants. GU14 6TD (GB)